The die size of the Celeron is the same of the Northwood. The 1.7GHZ and 1.GHz Celerons have 0.18µ die size while the new 2GHz Celeron is 0.13µ. Generally speaking, the smaller the die size the cooler the CPU. It'll require less voltage to run and also give better overclocking results. Thus, the new Celeron should definitely overclock better than the older Celerons.